2/0 AWG Wire: Ampacity, Uses & Specs | PES Supply
2/0 AWG Wire — Ampacity, Uses & Specifications
2/0 AWG copper wire is rated for 145-175 amps. Used for 200A residential service entrances and large generator installations.
2/0 AWG Wire Specifications
| Specification | Value |
|---|---|
| AWG Size | 2/0 |
| Ampacity (60°C / 140°F) | 145A |
| Ampacity (75°C / 167°F) | 175A |
| Resistance (Ω/1000 ft, Copper) | 0.078 |
| Wire Types Available | THHN, THWN-2, XHHW-2, USE-2, PV Wire, NM-B (Romex), MC Cable |
| Typical Breaker Size | 145A (60°C) or 175A (75°C) |
Common Applications
2/0 AWG copper wire is rated for 145-175 amps. Used for 200A residential service entrances and large generator installations.
Voltage Drop Reference (2/0 AWG Copper, 240V)
| Distance (ft) | VD @ 175A | % Drop | Status |
|---|---|---|---|
| 25 ft | 0.68V | 0.3% | Good |
| 50 ft | 1.36V | 0.6% | Good |
| 100 ft | 2.73V | 1.1% | Good |
| 150 ft | 4.09V | 1.7% | Good |
| 200 ft | 5.46V | 2.3% | Good |
Compatible Breakers and Outlets
For 2/0 AWG wire at 75°C rating (175A), use a 175A double-pole breaker (240V circuits) or 145A single-pole breaker (120V circuits at 60°C rating).
Related Wire Types
- THHN/THWN-2: For conduit runs, rated 90°C dry / 75°C wet
- NM-B (Romex): For indoor residential wiring, rated 60°C
- MC Cable: Metal-clad, for commercial and exposed runs
- USE-2 / PV Wire: For solar and direct burial, rated 90°C
- XHHW-2: For wet/dry locations, rated 90°C